Rock Identifier

Category

Mineral Like (Natural Glass)

Browse mineral like (natural glass) specimens identified by the Rock Identifier community.

Learn about Mineral Like (Natural Glass) in the encyclopedia

Obsidian

Black Obsidian

Macusanite

Baddeleyite

Green Obsidian

Blue Obsidian

Maskelynite

Midnight Obsidian

Sideromelane

Yellow-Green Obsidian

Yellow-Green Obsidian

Pink Obsidian

Perlite

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Fire Agate (Crackle Agate) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Fire Agate (Crackle Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Grey Quartz (likely Smoky Quartz or Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Grey Quartz (likely Smoky Quartz or Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Blue Goldstone (Man-made glass with cobalt and metal flecks) — man-made glass

Blue Goldstone

Man-made glass with cobalt and metal flecks

Quartz Crystal (Smoky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal (Smoky Quartz)

Silicon Dioxide (SiO2)

Polished citrine quartz point (Quartz, silicon dioxide (SiO₂), yellow-orange variety commonly sold as citrine; possibly heat-treated amethyst) — mineral

Polished citrine quartz point

Quartz, silicon dioxide (SiO₂), yellow-orange variety commonly sold as citrine; possibly heat-treated amethyst

Carborundum (Silicon Carbide (SiC)) — mineral

Carborundum

Silicon Carbide (SiC)

Aura Quartz (Titanium-coated Quartz) (Silicon Dioxide (SiO2) with metallic vapor coating) — mineral

Aura Quartz (Titanium-coated Quartz)

Silicon Dioxide (SiO2) with metallic vapor coating

Diamond (Faceted) (Carbon (C)) — mineral

Diamond (Faceted)

Carbon (C)

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Citrine Quartz (Silicon Dioxide (SiO2) with trace Iron) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with trace Iron

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear quartz crystal point (Quartz (silicon dioxide, SiO₂), likely a polished or cut crystal) — mineral

Clear quartz crystal point

Quartz (silicon dioxide, SiO₂), likely a polished or cut crystal

Chert (Siliceous Pebble) (Microcrystalline / Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Siliceous Pebble)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

Sea Glass (Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature) — mineral

Sea Glass

Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature

Amethyst cluster (Amethyst, purple quartz (SiO₂)) — mineral

Amethyst cluster

Amethyst, purple quartz (SiO₂)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Adventurine (Green) (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Adventurine (Green)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Sandstone (Weathered) (Arenite (typically SiO2 as quartz grains)) — sedimentary

Sandstone (Weathered)

Arenite (typically SiO2 as quartz grains)

Smoky Quartz / Agate Pebbles (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz / Agate Pebbles

Silicon Dioxide (SiO2)

Green Druzy Quartz (Prasiolite) (Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)) — mineral

Green Druzy Quartz (Prasiolite)

Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Clear Quartz Crystal (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Smoky Quartz (Silicon dioxide (SiO2)) — Mineral

Smoky Quartz

Silicon dioxide (SiO2)

Yellow Quartz (Citrine or Yellow Jasper) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Blue Sapphire (Corundum (Al2O3 with trace amounts of iron and titanium)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace amounts of iron and titanium)

Citrine Quartz (SiO2 (Silicon Dioxide with Iron impurities)) — mineral

Citrine Quartz

SiO2 (Silicon Dioxide with Iron impurities)

Amber (Succinite (fossilized tree resin)) — mineral

Amber

Succinite (fossilized tree resin)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Blue-dyed Quartz Druzy (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Blue-dyed Quartz Druzy

Silicon Dioxide (SiO2) with artificial pigment

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)